Ospreys work the ball to the 22, Grabham doing brilliantly to stay in play.
Palis slots it, and that could be enough to take the game from the Ospreys.
Knock on from the kick off gives possession straight back to Castres, and eventually the Ospreys are pinged right under their own sticks. Palis to go for goal.
Big decision there from the ref, Forrestier pinged at the scrum, Biggar now with the opportunity to reduce the gap.
Comedy of errors here, Biggar knocks on looking for the offload, only for Cabannes to knock on again. Scrum Castres in their own 22.
Coming in to the last ten minutes of the game here, hard to see where a try is going to come from for either side, Castres in pole position to close this one out though.
Bit of kick tennis ends with Ryan Jones putting in an ugly kick which reaches the ten metre line.
Wide ball to Cabannes, he gets the offload in to keep the play alive, but its turned over.
Big carry from Richie gray gets Castres to half way.
Tipuric comes up with a turnover, Biggar sends the ball down field, and Castres are running back.